Wednesday, October 28, 2015

Pre-Use Rinse Does Work!

Here are the data (RLU's - see below for explanation):
                                    August     September        October
 Nursing Bottle               191           3136                1
 Nursing Nipple            1010             256                0

The farm uses an upper threshold for calf feeding equipment of 100.

I am using the Hygiena SystemSure Plus unit to do adenosine triphosphate (ATP) monitoring. The ATP test is a process of rapidly measuring actively growing microorganisms through the detection of adenosine triphosphate. An ATP monitoring system can detect the amount of microbial contamination that remains after cleaning a surface (for example, calf feeding equipment). 

Thresholds used in the food processing industry are less than10 RLU for direct food contact surfaces and less than 50 RLU for environmental surfaces. I have been using a reading of 100 RLU as realistic on-farm upper threshold for calf feeding equipment

After the elevated readings in August and September the calf manager decided to add a "pre-use" rinse to their feeding routine. Starting at the beginning of October before starting the feeding this bottle is filled with warm water and health splash of household bleach - he shakes it and dumps out the rinse water. Then it goes into the feeding cart just in case it is needed. 

The bottle is only used when a young calf fails to drink her milk. The bottle was not used the morning I swabbed the bottle and nipple.

What was the problem back in August and September?  Several days may pass with the bottle not being used - yes, you are correct - this was an issue with bacteria regrowth following cleaning.

Now it is rinsed before each feeding just in case it will be needed. 

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